Robtex

Up: 203.241.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 203.241.136.0/22
Down right: 203.241.140.0/22

IP	Type	Hostname
203.241.136.81	A+PTR	user81.s136.samsung.co.kr
203.241.136.253	A	user253.s136.samsung.co.kr
203.241.138.96	A+PTR	user96.s138.samsung.co.kr
203.241.138.126	A	user126.s138.samsung.co.kr
203.241.138.144	A+PTR	user144.s138.samsung.co.kr
203.241.138.249	A+PTR	user249.s138.samsung.co.kr
203.241.140.52	A	user52.s140.samsung.co.kr
203.241.140.217	A+PTR	user217.s140.samsung.co.kr
203.241.142.23	A	user23.s142.samsung.co.kr
203.241.142.69	A	user69.s142.samsung.co.kr
203.241.142.206	A	user206.s142.samsung.co.kr
203.241.142.220	A	user220.s142.samsung.co.kr
203.241.142.237	A	user237.s142.samsung.co.kr
203.241.143.253	A	user253.s143.samsung.co.kr